package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aopalliance.intercept.Joinpoint;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MemberSignature;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
//切面类
public class AutoFillAspect {
    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..))&& @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {}

    /**
     * 前置通知
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinpoint) throws NoSuchMethodException {
        log.info("开始进行自动填充");
        //获取当前被拦截的方法的数据库操作类型
        MethodSignature signature = (MethodSignature) joinpoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = autoFill.value();
        //获取当前被拦截的方法的参数，实体对象
        Object[] args = joinpoint.getArgs();
        if(args==null||args.length==0)
        {
            return;
        }


        //准备赋值的数据
        Object entity = args[0];
        LocalDateTime now=LocalDateTime.now();
        Long currentId= BaseContext.getCurrentId();
        if(value==OperationType.INSERT)
        {
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod("setCreateTime", LocalDateTime.class);
                Method setCreateUser=entity.getClass().getDeclaredMethod("setCreateUser",Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);

                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch (Exception e)
            {
                e.printStackTrace();
            }
        }else if(value==OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch (Exception e)
            {
                e.printStackTrace();
            }

        }

    }
}
